ya but it also has more things like superfetch, built in antispyware, better IE and it's fully 64bit and more. so you see there are alot of new things in vista that xp doesnt have.
edit: I think vista is just an attempt at getting rid of third party companies that make browsers, antivirus, anti spyware because that's how ie became so widely used, because it was already in the operating system preinstalled so no one really bothered to go looking for a browser. And thats what ms is trying to do but now with antivirus, parental control software and antispyware.